| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 13553 |
92.3%
|
| 2 | SOME DIFFICULTY | 803 |
5.5%
|
| 3 | A LOT OF DIFFICULTY | 95 |
0.6%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 33 |
0.2%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 205 |
1.4%
|